treemap

Simple generic method with TreeMap as parameter

Simple generic method with TreeMap as parameter
I'm attempting to write a generic method that iterates TreeMap entries to get a value with its key (I'm using a custom comparator to sort the map based on values and as a result have broken the get() method, but that's not the problem I'm solving her

TreeMap with 2 keys

TreeMap with 2 keys
I am making a simple 2D java sidescroller, and right now, I have aHashMapwhere I have a classLocationas the key, andEntityas the value. I want to be able to store theEntityobjects in aTreeMap(or something similar) where I will have 2 keys:double xand

Not thread safe methods of CuncurrentSkipListMap in Java

Not thread safe methods of CuncurrentSkipListMap in Java
In my Java project I need to use TreeMap in multihreaded way. I found that ConcurrentSkipListMap is what that I need but some methods are not thread safe. One of them - containsKey(Object key). What is a typical solution for using this methods in mul

Java TreeMap iterator not working correctly for String keys

Java TreeMap iterator not working correctly for String keys
I have a TreeMap that maps String keys to a custom City class. Here is how it is instantiated:TreeMap<String, City> nameDictionary = new TreeMap<String, City>(new CityNameComparator());CityNameComparator implementation:public class CityNameCom

Display tree map in gui java [closed]

Display tree map in gui java [closed]
Firstly I am completely new to Java so please can you explain things as simple as possible!So I have a treemap, the keys are dates which point to strings.I want to display this on screen but am not sure how to do so.I did come across JTable. After re

Sorting a map by date key in Java

Sorting a map by date key in Java
I'm trying to sort a map in java by date key using TreeMap. Here's my codepublic static void sort() { BufferedReader br; String line; String[] data; Date date ; DateFormat df = new SimpleDateFormat("dd-mm-YYY"); Map<Date,String> map = new

subtitude keys and values in TreeMap with other TreeMap in Java

subtitude keys and values in TreeMap with other TreeMap in Java
Assuming I have aTreeMap<String,List<String> first;andTreeMap<String,String> Origin;And each key and each value in first has an equivalent key in origin. How can I substitute key and values of first with related value from Origin? For examp

TreeMap returning null for value that should exist for some object keys

TreeMap returning null for value that should exist for some object keys
I have an issue with aTreeMapthat we have defined a custom key object for. The issue is that after putting a few objects into the map, and trying to retrieve with the same key used to put on the map, I get a null. I believe this is caused by the fact

Treemap ignoring my override of the equals function

Treemap ignoring my override of the equals function
I have a TreeMap where RobotKey is a class consisting of a string field domain, and a long field timestamp. RobotKey implements comparable as follows:@Override public boolean equals(Object obj) { if (this.domain.equals(((RobotKey) obj).getDomain()))

How to iterate over TreeMap from end to beginning [duplicate]

How to iterate over TreeMap from end to beginning [duplicate]
This question already has an answer here:How to Print treemap in reverse order3 answersI need to iterate through aTreeMap<Integer, T> mapfrom the end to beginning. How to do so?I have tried the same thing as the answer in posted topic below:new Comp

d3.nest() key and values conversion to name and children

d3.nest() key and values conversion to name and children
I am working on creating a Treemap from a csv file. The data in the csv file is hierarchical, as a result i used d3.nest(). However, the resulting JSON is in the form of {key:"United States", values:[...]} The zoomable treemap e.g (http://mbosto
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